Phonograph record



J. H. ADAMS.

PHONOGRAPH RECORD.

` APPLICATION man MAY1B.|921.

1,41 1,55 l Patented Apr. 4, 1922.

MMM

UNITED STAT JOI-IN H. ADAMS, OF KALAMAZOO, MICHIGAN.

PHONOGRAPH RECORD.

Specification of Letters Patent.

Patented Apr. 4, 1922.

Application filed May 18, 1921. Serial No. 470,566.

To all whom t may concern:

Be it known that I, JOHN kII. ADAMS, a citizen of the United States, 'residing at the city and county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements inPhonograph Records, of which the following is a specification.

This invention relates to improvements in phonograph records.

Various attempts have been made to provide means for automatically disengaging the stylus from the record and, among other means, records have been provided with projections adapted to raise the sound box and a catch is provided for holding the sound box in elevated or raised position.

The main object of this invention is to provide a disk record having means for elevating the sound box at the end of the record which does not detract from the appearance of the record, does not prevent the records being stacked one upon another and, further, records having these advantages which are economical to produce and durable in that there are no projecting parts to be broken off in handling.

Further objects, and objects relating to structural details, will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming apart of this specification, in which:

Fig. I is a detail plan view of the tone arm, sound box and turntable of a phonograph, with one of my improved records upon the turntable.

Fig. II is a detail broken section on a line pprreponding to the broken line 2-2 of 1g.

Fig. III is a detail broken section corresponding to Fig. II, showing the sound box in its elevated position.

Fig. IV is an enlarged fragmentary section on a line corresponding to line i- 4C of Fig. I.

Fig. V is an enlarged fragmentary view of the record.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are Y box neck 9 holding the sound taken looking in the direction of the little arrows at the ends of the section lines. p y Referring to the drawing, l represents the body of a phonograph, 2 the turntable or record holder, 3 the tone arm, 4 the sound box, and 5 the needle or stylus. The tone arm is provided with a catch pin 6 adapted to engage a hole 7 in the arm 8 on the sound box in elevated position. The details of this catchform'no part of my present invention and are, therefore, not further illustrated herein.

yimproved record l0 is provided with a raised central portion 11 at the inside of the record surface l2. This raised portion has an-inclined periphery 13. The record may have the raised portion on both sides as is indicated by the dotted lines in Fig. II. This inclined surface 13 has a spiral groove 15 therein which .is a continuation of the record groove 16, so that the stylus travels from the record grooves into the groove 15 on the inclined surface whereby it is gradually raised as it travels up the incline. At one or more places in its convolutions the groove l5 is provided with offsets 17 arranged in alinement as best shown in Figs. I and V. As the stylus travels in the several convolutions of the groove 15 it passes into the offset 17 which raises and lowers it again unless it be raised to such an extent that the catch 6 engages the sound box arm 8, in which case the stylus is freed from the groove as it passes from the ofi'- set, thereby releasing the sound box and supporting it in elevated position.

I thus provide a disk record adapted to elevate the soundV box for releasing the same and at the same time a record which may be economically produced7 is neat and attractive in appearance and has no projecting parts to be broken off in handling.

While I have illustrated the raised por* tion on one side only of the record it may be provided on both sides in which case, however, a special table must be provided having a recess 18 adapted to receive the raised portion.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. As an article of manufacture, a disk record having on one side a record surface and a raised central portion with an inclined periphery merging into the record surface, said inclined portion having a Spiral groove continuation of the record groove, the convolutions of such continuation groove having upwardly curved alined offsets therein wliereb a stylus traveling in the groove i is gradua ly raised as it travels up Vthe ineline and is raised and lowered by said ofsets. Y

2. As an article of manufacture, a disk record having on one side a record surface and a raised central portion with an inclined periphery merging into the record surface, there being a spiral groove in said inclined surface whereby a stylus traveling in the groove is raised as it travels up the incline.`

3. A disk record having a central annular :outwardly inclined surface having thereon a spiral oove continuation of the record Y groove, t e convolutions of such continuation groove having alined upwardly disposed oifsets whereby a stylus traveling in the groove` is raised as it travels up the incline and is further raised and lowered by erga ement with said offsets.

4. isk record having a central annular ward offsets therein.

outwardly inclined surface having thereon a spiral groove continuation of the record groove, whereby a stylus traveling in theV groove in the inclined surface is raised as it travels inwardly.

5. As an article of manufacture, a disk record having an outwardly inclined surface JoHN H; Anims. [n 5.1

Witnesses Gr. Hf NELSON, H. E. COLE. 

